A.from sunset to sunrise and during restricted visibility
B.only when other vessels are in the area
C.only when operating in a traffic separation scheme
D.only when under tow
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A.lights that must be displayed on anchor buoys
B.the display of load line markings
C.minimum horsepower for tugs involved in rig moves
D.lighting of mobile offshore drilling units being towed
A.2 to 4 seconds
B.4 to 6 seconds
C.6 to 8 seconds
D.8 to 10 seconds
A.Geographical positions outlining the area of the sector
B.True bearings as observed from the ship toward the light
C.An outline of the area of the sector
D.True bearings as observed from the light toward the ship
A.show a fixed red light if lighted
B.show a Morse (A) white light
C.be square in shape
D.have an even number if numbered
A.must be displayed when day signals are being used
B.must be displayed when moored to a pier
C.may be extinguished at night on open waters when no other vessels are in the area
D.may be displayed during daylight
最新試題
Approaching an anchorage in fog，you hear one short，one prolonged，and one short blast in that sequence on a ship’s whistle． This indicates（）.
An occulting light is one in which（）.
A towing vessel 30 meters in length is pushing barges ahead. How many white masthead lights is the vessel REQUIRED to show at night?（）
As defined in the Rules，a towing light is a yellow light having the same characteristics as a(n)（）.
The International Regulations for Preventing Collisions at Sea contain the requirements for （）.
An all-round flashing yellow light may be exhibited by a(n)（）.
A power-driven vessel underway shall keep out of the way of（）.
An inconspicuous，partly submerged vessel or object being towed，where the length of tow is 100 meters，shall show（）.
A power-driven vessel，when towing astern，shall show（）.
A vessel is fishing at anchor on the high seas. Which of the following day signals should she display if she has gear extending out over 150 meters horizontally from the vessel?（）.